mul_u64_u32_shr

函数名称：mul_u64_u32_shr

函数原型：static inline u64 mul_u64_u32_shr(u64 a, u32 mul, unsigned int shift)

返回类型：u64

参数：

类型	参数	名称
u64	a
u32	mul
unsigned int	shift

198

al等于a

199

ah等于a右移32位

201

ret等于mul_u32_u32(al, mul)右移shift位

202

如果ah则ret加等于mul_u32_u32(ah, mul)左移32减shift位

205

返回:ret

**调用者**
名称	描述
cycles_2_ns	Accelerators for sched_clock()* convert from cycles(64bits) => nanoseconds (64bits)* basic equation:* ns = cycles / (freq / ns_per_sec)* ns = cycles * (ns_per_sec / freq)* ns = cycles * (10^9 / (cpu_khz * 10^3))* ns = cycles * (10^6 / cpu_khz)
__set_cyc2ns_scale
__calc_delta	delta_exec * weight / lw.weight* OR* (delta_exec * (weight * lw->inv_weight)) >> WMULT_SHIFT* Either weight := NICE_0_LOAD and lw \e sched_prio_to_wmult[], in which case* we're guaranteed shift stays positive because inv_weight is guaranteed to
decay_load	Approximate:* val * y^n, where y^32 ~= 0.5 (~1 scheduling period)
clocksource_stop_suspend_timing	locksource_stop_suspend_timing - Stop measuring the suspend timing@cs: current clocksource from timekeeping@cycle_now: current cycles from timekeeping* This function will calculate the suspend time from suspend timer.

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码